Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ad1a424f8f62d3…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 04:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 330ac3b0b32dc97d3da997f7bde37438 SHA-1: 6b4ed053efb11b5708b0a1a591850bbf5832c688 SHA-256: 62ad1a424f8f62d3bc14a616f0f4bdae84ea3c6c191882d25146445e24b36203
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm or SEO spam campaign. The presence of a malicious redirector suggests an attempt to lead the user to a harmful site, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=12v+7ah+battery+charger+circuit+diagram
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ee6770_22d1c4e67af94d338d13f1e0aaf9e377.pdf
    • https://static.usrfiles.com/ugd/a43ec6_a4bd926891764662a39aba14c25fc492.pdf
    • https://static.usrfiles.com/ugd/538d67_81ac40bfd4014977864b471ee9c39ee1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/bogitora_2005_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/60703386438.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/79323780760.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/86169202249.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/fepala.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/16819981232.pdf
    • https://cdn.shopify.com/s/files/1/0431/9543/3117/files/woguligufarasirutuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7102/8896/files/lamoluwaxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006549.bin
9c932e4caa7b3a828d3e36d058414fc93a0699543d395d13d63e568964e37771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5616 bytes
font_01_sfnt_off00007847.bin
81dafc87415db83dbaa0c513e73a2596606b1fdb96cf02c8cc0f65450b9ba4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7847 13980 bytes

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